Exodus 6:28-30

Darby Translation

²⁸ And it came to pass on the day when Jehovah spoke to Moses in the land of Egypt,

²⁹ that Jehovah spoke to Moses, saying, I am Jehovah: speak thou unto Pharaoh king of Egypt all that I say unto thee.

³⁰ And Moses said before Jehovah, Behold, I am of uncircumcised lips, and how will Pharaoh hearken unto me?